Caption: Thomas Karl above the roofs of Innsbruck, Austria Photo credit: University of Innsbruck
Traffic contributes more to nitrogen oxide emissions in Europe than previously thought. This is the result of a current study carried out by scientists from the University of Innsbruck. The research team headed by Thomas Karl shows that even newer air quality models underestimate traffic related nitrogen oxide pollution by up to a factor of 4. The results of the study are published in the Nature journal Scientific Reports. In metropolitan areas throughout Europe maximum permissible values of nitrogen oxide are consistently breached. It has been a challenge to determine how much each polluter contributes to the emission output. Until now emission levels were mainly calculated by collecting emission data at laboratory testing facilities and subsequently extrapolating them in models.
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